Find the Dot Product Of $\mathbf { u }$ And $\mathbf { v }$

Multiple Choice

Find the dot product of $\mathbf { u }$ and $\mathbf { v }$ .
$$\mathbf { u } = \langle - 3 , - 2,4 \rangle , \mathbf { v } = \langle - 4 , - 5 , - 7 \rangle$$

A) $- 6$
B) $- 17$
C) $\langle 12,10 , - 28 \rangle$
D) 50
E) $\langle - 7 , - 7 , - 3 \rangle$